Relationship between postoperative tumor recurrence time and long-term survival in colorectal cancer patients

Table 1 Comparison of general clinical data between groups, n (%)

Clinical characteristics	Early recurrence group (n = 63)	Late recurrence group (n = 57)	Statistical value	P value
Gender			χ² = 0.046	0.831
Male	38 (60.3)	33 (57.9)
Female	25 (39.7)	24 (42.1)
Age (years, mean ± SD)	62.4 ± 11.3	59.7 ± 10.8	t = 1.338	0.183
BMI (kg/m², mean ± SD)	23.6 ± 3.2	24.1 ± 3.5	t = 0.892	0.374
Smoking history	24 (38.1)	19 (33.3)	χ² = 0.302	0.583
Drinking history	17 (27.0)	13 (22.8)	χ² = 0.286	0.593
Family history of CRC	8 (12.7)	6 (10.5)	χ² = 0.151	0.698
Comorbidities
Hypertension	23 (36.5)	18 (31.6)	χ² = 0.521	0.470
Diabetes	11 (17.5)	9 (15.8)	χ² = 0.338	0.561
Coronary heart disease	6 (9.5)	4 (7.0)	χ² = 0.245	0.621
ASA classification			χ² = 0.428	0.807
I-II	51 (81.0)	48 (84.2)
III	12 (19.0)	9 (15.8)
Tumor location			χ² = 0.228	0.633
Colon cancer	36 (57.1)	35 (61.4)
Rectal cancer	27 (42.9)	22 (38.6)

ASA: American Society of Anesthesiologists; BMI: Body mass index; CRC: Colorectal cancer.